Electrical Wiring Connection; Pv Wiring Connection; Battery Wiring Connection - LG LGES-5048 User Manual

2.4 Electrical Wiring Connection

2.4.1 PV Wiring Connection

Before connecting PV panels/strings to inverter, please make sure requirements are followed as
below:
• The total short-circuit current of PV string must not exceed inverter's max DC current.
• The minimum isolation resistance to ground of the PV string must exceed 19.33kΩ in case of
any shock hazard.
• PV string must not connect to earth/grounding conductor.
• Use the right PV plugs in the accessory box. (BAT plugs are similar to PV plugs, please confirm
before use it.)
Note: There will be MC4 plugs in accessory box. The details of connections are as below.
Step 1
Prepare PV cables and PV plugs.
2.5-4mm 7mm
2
2.5-4mm 7mm
2
09
Note:
1. Please use PV plugs and connectors
from accessory box.
2. PV cable should be standard
2.5-4mm .
2
Step 3
Screw the cap on and plug it onto inverter side.
Note: There will be a click sound if connectors are inserted correctly into PV plugs.
Reversing the polarity of PV strings could cause damage to the inverter.
Step 2
Connect PV cables to PV connectors.
MC4 Series
Note:
1. PV cables must be tightly crimped into
the connectors.
2. There will be a click sound if connectors
are inserted correctly into PV plugs.

2.4.2 Battery Wiring Connection

Please be careful about any electric shock or chemical hazard.
Make sure there is an external DC breaker (125A) connected to the battery circuit.
Make sure that the breaker is off and battery is LG Energy Solution RESU 6.5/10/12/13
48V nominal battery only before connecting battery to inverter. Make sure inverter is
totally isolated from PV and AC power.
Battery cables requirement as Figure 2.4.2-1.
A B
C
Figure 2.4.2-1
Battery wiring connection process
Step 1
Prepare battery cables and accessories and put
battery power cable through battery cover.
Note:
1. Please use accessories from accessory box.
2. Battery power cable should be 35mm
2.
Step 2
Make battery terminals
• Strip cable coat, revealing 10mm length of metal core.
• Use special crimper to compress battery terminal
tightly.
Step 3
Connect battery terminal onto inverter .
Note:
Please make sure polarity (+/-) of battery are
not reversed.
Fastening torsion 6-8N.m
* For the compatible LG RESU batteries, please refer to battery connection in LGES-5048 QUICK
INSTALLATION INSTRUCTIONS.
Grade Description Value
A Outside Diameter Insulation 10-14 mm
B Isolation Section NA
C Conductor Core Section 35mm
Battery Terminal
Waterproof Ring
Cable
Insulator
Screw Cap
Pan Head Screw
10